The smallest lake in africa is Lake Edward
The following statements about mining is true: Mining allows useful minerals to be extracted from the Earth. Correct answer:D
Mining has a large impact on the environment because minerals are contained within the Earth. The long term effects of mining include acid drainage
, erosion
and dust emissions.
Answer:
Core samples and Tree rings
Explanation:
Very early societies did not have a written language or ways to efficienly preserve information over time
Answer:
Star A is 3.343 times hotter than star B.
Explanation:
It is known that the luminosity of a star is proportional to its effective temperature to the 4th power. This means that the ratio between the brightness of stars A and B is equal to the ratio between their temperatures to the 4th power:
![125=T^4\\T=\sqrt[4]{125}\\T=3.343](https://tex.z-dn.net/?f=125%3DT%5E4%5C%5CT%3D%5Csqrt%5B4%5D%7B125%7D%5C%5CT%3D3.343)
Star A is 3.343 times hotter than star B.